updates readme

Author: diroru

README.md

@@ -2,7 +2,17 @@ The planetarium library is intended to project 3D Processing sketches on spheric
 
 It is based on the FullDomeTemplate code from Christopher Warnow, available at https://github.com/mphasize/FullDome
 
-### Overview
+### Work in progress
+
+Switching to a raycasting approach in the cube map rendering stage. Will also fix the `createShape()`-bug (as of Processing 3.3.6).
+
+**TODO:**
+- ~~variable aperture~~
+- reimplement debug grid
+- custom sweet spot
+- toggle rendering of the sixth (or any) side
+
+### Overview (original)
 
 A brief descrition of how it works: a 360° view of the scene is generated by rendering the scene 6 times from each direction: positive x, negative x, and so on. The output of each rendering is stored inside a cube map texture, which is then applied on a sphere representing the dome. Hence, the library calls the draw() method 6 times per frame in order to update the corresponding side of the cube map texture (in reality, only 5 times since the bottom side of the cube map is not invisible on the dome).